$\lim_{x\to+\infty}\left(\frac{\pi}{2}-\arctan\left(x\right)\right)^{\frac{1}{x}}$
$5x-2>5+2x$
$\int_1^{\infty}\left(\frac{1}{e^{3x}+4}\right)dx$
$\left(3xy^2+8y^3\right)^3$
$\frac{2x}{x^2+x}$
$7+\left(3-1\right)^2$
$\int\:\frac{x+3}{\sqrt{x}\sqrt{x+2}}dx$
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